someone on the forum was saying that if your alsion has ever been put into limp mode a valve body upgrade has no impact on keeping this from happening,Im not saying that he is wrong I just want know if anyone else has heard of this????
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the problem is when you limp the stock tranny the clutches lose alot of there holding power. so once you have slipped them the shim modd will not really benefit you.

Moved to Allison OEM!